JP2002242202A - Column base part construction method for foundation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a column base part construction method for a foundation capable of positioning an anchor bolt and adjusting its positioning simply. SOLUTION: This column base part 10 construction method for the foundation 1 is constituted by placing concrete in a form 2 assembled at site, fixing an anchor plate 20 to a position equivalent to a column base part 10 of the form 2, and fixing an anchor bolt 3 to the anchor plate 20 in a condition in which it is hung down to position the anchor bolt 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a foundation column in a residential building.

[0002]

2. Description of the Related Art Generally, anchor bolts for fixing steel columns are buried in column bases of a foundation, and are constructed so as to have a predetermined embedding depth and a protruding height from a top end surface of the foundation. .

[0003] Conventionally, when the column base of the foundation is constructed, the anchor bolt is fixed to a positioning jig on the ground constituting the foundation, and is fixed to the positioning jig to be self-standing. Then, when fixing the anchor bolt to the positioning jig, by adjusting the fixing height of the anchor bolt to the positioning jig, the protrusion height of the anchor bolt protruding from the foundation is adjusted to a predetermined size. Had been done.

[0004]

However, in the case of the above-mentioned conventional construction method, the positioning jig must be fixed to the ground in a stable state in order for the anchor bolt to stand firmly and independently. Therefore, in order to fix the positioning jig, there is a trouble that the concrete has to be cast in advance on the ground at the construction position of the column base so as to be flat.

After the anchor bolts are fixed to the positioning jig and made independent, a formwork for concrete casting is assembled around the anchoring jig. After the formwork is assembled, the anchor bolts can be positioned. If not, there is a disadvantage that the mold must be removed and the position and height must be adjusted again.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a method of constructing a column base portion of a foundation which can be easily positioned and adjusted.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a method of constructing a column-base portion of a foundation according to the present invention is a method of constructing a foundation formed by casting concrete in a formwork assembled on site. The frame body is fixed at a position corresponding to the column base of the formwork, and the anchor bolt is fixed in a state where the anchor bolt is suspended from the frame body, thereby positioning the anchor bolt.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows a main part of a method of constructing a column base 10 of a foundation 1.

That is, in the method of installing the column base 10 of the foundation 1, the anchor plate 20 is fixed to a position corresponding to the column base 10 of the formwork 2, and the anchor bolts 3 are suspended from the anchor plate 20. In this state, the anchor bolts 3 are positioned in a fixed state.

The base 1 is composed of a base 1a having a width of 500 to 1500 mm and a height of 300 mm, and a main body 1b integrated on the base 1a and having a width of 440 mm and a height of 580 mm. .

In the foundation 1, the base 1a and the lower half of the main body 1b form a structural foundation 11, and the main body 1b
The upper half is a wall receiving base 12.

The column base 10 includes a wall receiving foundation 12 of the foundation 1.
Is partially recessed so as to be constituted only by the portion of the structural foundation 11, and the heavy steel column 4 constituting the skeleton is formed.
The anchor bolt 3 is provided with a predetermined length so as to be able to be fixed.

The formwork 2 used for the construction of the foundation 1
It is composed of a base frame 21, a body frame 22, and an anchor plate 20. The base frame 21 and the body frame 22
It is used in the same manner as when a normal structural foundation 11 is constructed. That is, the base frame 2 surrounding the base 1a
1 and a plate-shaped main body frame 22 surrounding the main body 1b. However, the body frame 2 used here
Regarding 2, since the structural foundation 11 and the wall receiving foundation 12 are integrally constructed by one-time concrete casting, it is possible to secure a height higher than the conventional one, that is, a height of 580 mm. Is used.

As shown in FIG. 2, the anchor plate 20 has a pair of plate bodies 23 formed by dividing a substantially rectangular cylinder into two.
And a partition plate 24 located in the substantially rectangular cylinder. The plate main body 23 has a lower flange portion 23a extending inward at a lower end thereof, and an upper flange portion 23b extending outwardly at an upper end thereof. The partition plate 24 has a Z-shaped engaging piece 24b extending from each side of a substantially square plate surface 24a.

This anchor plate 20 is used for the partition plate 2
Plate body 23 so as to surround the engagement piece 24b of FIG.
Are combined to form a substantially quadrangular cylindrical shape, and the plate surface 24a of the partition plate 24 is positioned therein to form a substantially quadrangular cylindrical concave portion.

The anchor plate 20 is inserted into a position corresponding to the column base 10 of the foundation 1 in the framed main body frame 22, and the upper flange portion 23b of the plate main body 23 is provided.
Is placed on the upper surface of the main body frame 22. The pin holes 23c and 2c provided in the upper flange portion 23b and the engagement piece 24b of the partition plate 24 are formed.
The anchor plate 20 is fixed to the upper surface of the body frame 22 by driving a pin (not shown) into 4c.
As a result, the anchor plate 20 partially recesses the portion of the wall receiving base 12 in the formwork 2 to form the structural base 11.
Only the column base 10 is configured.

The anchor bolt 3 is connected to the anchor plate 2
The zero partition plate 24 is inserted through four round holes 24d provided near four corners of the plate surface 24a. This anchor bolt 3
Is fixed to the anchor plate 20 by screwing the nut 31 so as to clamp and fix the upper and lower surfaces of the plate surface 24a. At this time, the anchor bolt 3
By adjusting the screwing position of the nut 31, it is possible to adjust the fixing position with respect to the partition plate 24,
Positioning can be performed while being suspended from the anchor plate 20. Nut 3 screwed into anchor bolt 3
For 1, the one used for fixing the heavy steel column 4 is used as it is.

As described above, the anchor bolt 3 is attached to the form 2
It is not necessary to position and fix the ground 5 in advance before installation of the base frame 5 so that the base frame 21 or the main body frame 22 can be self-supported. Positioning can be easily performed. Moreover, since the positioning of the anchor bolt 3 can be performed after the construction of the formwork 2,
Unlike the related art, when the positioning of the anchor bolt 3 cannot be performed, the positioning can be easily performed again without the trouble of removing the mold 2 and performing the positioning again.

However, the anchor bolt 3 is attached to the body frame 22.
Is fixed to the anchor plate 20 fixed to the anchor plate 20 and positioned. Therefore, in order to accurately perform the positioning with the anchor bolts 3, carefully install the main body frame 22 serving as a base thereof. It must be kept.

The main body frame 22 is installed by using a support bracket 6 as shown in FIG. 3 or a base block 7 as shown in FIG. That is, the support bracket 6 is
The main body frame 2 is placed on two support bolts 62 extending from
The support frame 63 is supported by the support bolt 62, and the height of the support bracket 63 supported on the support bolt 62 is adjusted by an adjustment disk 64 screwed to the support bolt 62, so that the main body frame is supported. 22 can be installed at the correct height position. Further, the base block 7 is configured to fix the receiving metal member 71 of the main body frame 22 on the base block 7.
Since the height cannot be adjusted as in the case of the support fitting 6, the horizontal adjustment and the height adjustment are performed by the mortar 72 provided below the base block 7.

After positioning the anchor bolts 3 as described above, concrete is cast into the formwork 2 and
Will be finished.

In addition, root cutting, how to use, gravel, split chestnut grounds, placement of the reinforcing steel bar 5, placing concrete, curing, removing frames, etc., which are performed when the foundation 1 is constructed, are performed by conventional methods. .

Further, in this embodiment, the anchor plate 20 for suspending and fixing the anchor bolt 3 is configured to form a substantially rectangular cylindrical concave portion. Although the structural foundation 11, the wall receiving foundation 12, and the column base 10 are constructed at one time, the anchor plate 20 is not particularly limited to this. Alternatively, it may be simply formed in a plate shape that connects the opposing body frames 22. However, in that case, Basic 1
As described above, the structural foundation 11 and the wall receiving foundation 12
Therefore, the structural foundation 11 and the wall receiving foundation 12 must be constructed separately.

Further, in the present embodiment, the lower end of the anchor bolt 3 is free, but the lower end of the anchor bolt 3 is supported by a support fitting (not shown) fixed to the ground 5. It may be made as follows.

[0026]

As described above, according to the present invention, the frame is fixed at a position corresponding to the column base of the formwork, and the anchor bolt is hung on the frame to be fixed and positioned. It is possible to easily adjust the positioning without the hassle of fixing the positioning jig to the ground and setting the anchor bolts to stand before installing the formwork, and the state where the formwork is assembled The height can be easily adjusted again as it is.

In addition, since it is not necessary to fix the positioning jig to the ground, the work of casting discarded concrete for fixing the positioning jig and the cost of the positioning jig can be reduced.

[Brief description of the drawings]

1 (a) and 1 (b) are schematic views of a main part for explaining a method for installing a column base of a foundation according to the present invention.

FIG. 2 shows a method for constructing a column base of a foundation according to the present invention;
It is a disassembled perspective view which shows the anchor plate used for construction of a column base part.

FIG. 3A is an exploded perspective view showing an outline of an entire configuration of a support bracket used for installing a main body frame in the method for installing a column base portion of a foundation according to the present invention, and FIG. It is a perspective view showing a use state.

FIG. 4 shows a method for constructing a column base portion of a foundation according to the present invention;
It is a perspective view which shows the use condition of the base block used for installation of a main body frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foundation 10 Column base 2 Formwork 20 Anchor plate (frame) 3 Anchor bolt

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E04B 1/41 502 E04B 1/41 502F

Claims (1)

[Claims] 1. A method of constructing a foundation formed by casting concrete in a formwork assembled on site, comprising fixing a frame body at a position corresponding to a column base of the formwork. A method for constructing a pillar base of a foundation, comprising fixing an anchor bolt in a state where the anchor bolt is hung on a body and positioning the anchor bolt.